/*! `c` grammar compiled for Highlight.js 11.9.0 */
var hljsGrammar = (function () {
  'use strict';

  /*
  Language: C
  Category: common, system
  Website: https://en.wikipedia.org/wiki/C_(programming_language)
  */

  /** @type LanguageFn */
  function c(hljs) {
    const regex = hljs.regex;
    // added for historic reasons because `hljs.C_LINE_COMMENT_MODE` does
    // not include such support nor can we be sure all the grammars depending
    // on it would desire this behavior
    const C_LINE_COMMENT_MODE = hljs.COMMENT('//', '$', { contains: [ { begin: /\\\n/ } ] });
    const DECLTYPE_AUTO_RE = 'decltype\\(auto\\)';
    const NAMESPACE_RE = '[a-zA-Z_]\\w*::';
    const TEMPLATE_ARGUMENT_RE = '<[^<>]+>';
    const FUNCTION_TYPE_RE = '('
      + DECLTYPE_AUTO_RE + '|'
      + regex.optional(NAMESPACE_RE)
      + '[a-zA-Z_]\\w*' + regex.optional(TEMPLATE_ARGUMENT_RE)
    + ')';


    const TYPES = {
      className: 'type',
      variants: [
        { begin: '\\b[a-z\\d_]*_t\\b' },
        { match: /\batomic_[a-z]{3,6}\b/ }
      ]

    };

    // https://en.cppreference.com/w/cpp/language/escape
    // \\ \x \xFF \u2837 \u00323747 \374
    const CHARACTER_ESCAPES = '\\\\(x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4,8}|[0-7]{3}|\\S)';
    const STRINGS = {
      className: 'string',
      variants: [
        {
          begin: '(u8?|U|L)?"',
          end: '"',
          illegal: '\\n',
          contains: [ hljs.BACKSLASH_ESCAPE ]
        },
        {
          begin: '(u8?|U|L)?\'(' + CHARACTER_ESCAPES + "|.)",
          end: '\'',
          illegal: '.'
        },
        hljs.END_SAME_AS_BEGIN({
          begin: /(?:u8?|U|L)?R"([^()\\ ]{0,16})\(/,
          end: /\)([^()\\ ]{0,16})"/
        })
      ]
    };

    const NUMBERS = {
      className: 'number',
      variants: [
        { begin: '\\b(0b[01\']+)' },
        { begin: '(-?)\\b([\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)((ll|LL|l|L)(u|U)?|(u|U)(ll|LL|l|L)?|f|F|b|B)' },
        { begin: '(-?)(\\b0[xX][a-fA-F0-9\']+|(\\b[\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)([eE][-+]?[\\d\']+)?)' }
      ],
      relevance: 0
    };

    const PREPROCESSOR = {
      className: 'meta',
      begin: /#\s*[a-z]+\b/,
      end: /$/,
      keywords: { keyword:
          'if else elif endif define undef warning error line '
          + 'pragma _Pragma ifdef ifndef include' },
      contains: [
        {
          begin: /\\\n/,
          relevance: 0
        },
        hljs.inherit(STRINGS, { className: 'string' }),
        {
          className: 'string',
          begin: /<.*?>/
        },
        C_LINE_COMMENT_MODE,
        hljs.C_BLOCK_COMMENT_MODE
      ]
    };

    const TITLE_MODE = {
      className: 'title',
      begin: regex.optional(NAMESPACE_RE) + hljs.IDENT_RE,
      relevance: 0
    };

    const FUNCTION_TITLE = regex.optional(NAMESPACE_RE) + hljs.IDENT_RE + '\\s*\\(';

    const C_KEYWORDS = [
      "asm",
      "auto",
      "break",
      "case",
      "continue",
      "default",
      "do",
      "else",
      "enum",
      "extern",
      "for",
      "fortran",
      "goto",
      "if",
      "inline",
      "register",
      "restrict",
      "return",
      "sizeof",
      "struct",
      "switch",
      "typedef",
      "union",
      "volatile",
      "while",
      "_Alignas",
      "_Alignof",
      "_Atomic",
      "_Generic",
      "_Noreturn",
      "_Static_assert",
      "_Thread_local",
      // aliases
      "alignas",
      "alignof",
      "noreturn",
      "static_assert",
      "thread_local",
      // not a C keyword but is, for all intents and purposes, treated exactly like one.
      "_Pragma"
    ];

    const C_TYPES = [
      "float",
      "double",
      "signed",
      "unsigned",
      "int",
      "short",
      "long",
      "char",
      "void",
      "_Bool",
      "_Complex",
      "_Imaginary",
      "_Decimal32",
      "_Decimal64",
      "_Decimal128",
      // modifiers
      "const",
      "static",
      // aliases
      "complex",
      "bool",
      "imaginary"
    ];

    const KEYWORDS = {
      keyword: C_KEYWORDS,
      type: C_TYPES,
      literal: 'true false NULL',
      // TODO: apply hinting work similar to what was done in cpp.js
      built_in: 'std string wstring cin cout cerr clog stdin stdout stderr stringstream istringstream ostringstream '
        + 'auto_ptr deque list queue stack vector map set pair bitset multiset multimap unordered_set '
        + 'unordered_map unordered_multiset unordered_multimap priority_queue make_pair array shared_ptr abort terminate abs acos '
        + 'asin atan2 atan calloc ceil cosh cos exit exp fabs floor fmod fprintf fputs free frexp '
        + 'fscanf future isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper '
        + 'isxdigit tolower toupper labs ldexp log10 log malloc realloc memchr memcmp memcpy memset modf pow '
        + 'printf putchar puts scanf sinh sin snprintf sprintf sqrt sscanf strcat strchr strcmp '
        + 'strcpy strcspn strlen strncat strncmp strncpy strpbrk strrchr strspn strstr tanh tan '
        + 'vfprintf vprintf vsprintf endl initializer_list unique_ptr',
    };

    const EXPRESSION_CONTAINS = [
      PREPROCESSOR,
      TYPES,
      C_LINE_COMMENT_MODE,
      hljs.C_BLOCK_COMMENT_MODE,
      NUMBERS,
      STRINGS
    ];

    const EXPRESSION_CONTEXT = {
      // This mode covers expression context where we can't expect a function
      // definition and shouldn't highlight anything that looks like one:
      // `return some()`, `else if()`, `(x*sum(1, 2))`
      variants: [
        {
          begin: /=/,
          end: /;/
        },
        {
          begin: /\(/,
          end: /\)/
        },
        {
          beginKeywords: 'new throw return else',
          end: /;/
        }
      ],
      keywords: KEYWORDS,
      contains: EXPRESSION_CONTAINS.concat([
        {
          begin: /\(/,
          end: /\)/,
          keywords: KEYWORDS,
          contains: EXPRESSION_CONTAINS.concat([ 'self' ]),
          relevance: 0
        }
      ]),
      relevance: 0
    };

    const FUNCTION_DECLARATION = {
      begin: '(' + FUNCTION_TYPE_RE + '[\\*&\\s]+)+' + FUNCTION_TITLE,
      returnBegin: true,
      end: /[{;=]/,
      excludeEnd: true,
      keywords: KEYWORDS,
      illegal: /[^\w\s\*&:<>.]/,
      contains: [
        { // to prevent it from being confused as the function title
          begin: DECLTYPE_AUTO_RE,
          keywords: KEYWORDS,
          relevance: 0
        },
        {
          begin: FUNCTION_TITLE,
          returnBegin: true,
          contains: [ hljs.inherit(TITLE_MODE, { className: "title.function" }) ],
          relevance: 0
        },
        // allow for multiple declarations, e.g.:
        // extern void f(int), g(char);
        {
          relevance: 0,
          match: /,/
        },
        {
          className: 'params',
          begin: /\(/,
          end: /\)/,
          keywords: KEYWORDS,
          relevance: 0,
          contains: [
            C_LINE_COMMENT_MODE,
            hljs.C_BLOCK_COMMENT_MODE,
            STRINGS,
            NUMBERS,
            TYPES,
            // Count matching parentheses.
            {
              begin: /\(/,
              end: /\)/,
              keywords: KEYWORDS,
              relevance: 0,
              contains: [
                'self',
                C_LINE_COMMENT_MODE,
                hljs.C_BLOCK_COMMENT_MODE,
                STRINGS,
                NUMBERS,
                TYPES
              ]
            }
          ]
        },
        TYPES,
        C_LINE_COMMENT_MODE,
        hljs.C_BLOCK_COMMENT_MODE,
        PREPROCESSOR
      ]
    };

    return {
      name: "C",
      aliases: [ 'h' ],
      keywords: KEYWORDS,
      // Until differentiations are added between `c` and `cpp`, `c` will
      // not be auto-detected to avoid auto-detect conflicts between C and C++
      disableAutodetect: true,
      illegal: '</',
      contains: [].concat(
        EXPRESSION_CONTEXT,
        FUNCTION_DECLARATION,
        EXPRESSION_CONTAINS,
        [
          PREPROCESSOR,
          {
            begin: hljs.IDENT_RE + '::',
            keywords: KEYWORDS
          },
          {
            className: 'class',
            beginKeywords: 'enum class struct union',
            end: /[{;:<>=]/,
            contains: [
              { beginKeywords: "final class struct" },
              hljs.TITLE_MODE
            ]
          }
        ]),
      exports: {
        preprocessor: PREPROCESSOR,
        strings: STRINGS,
        keywords: KEYWORDS
      }
    };
  }

  return c;

})();
;
export default hljsGrammar;